Faraday to Peter Henry Berthon   4 October 1862

Royal Institution | 4 Octr 1862

My dear Sir

Could the 2nd order lamp be burning in order at the Trinity House next Wednesday the 8th from about 1.30 onwards. If so I will be there at 2 o’clk or soon after to experiment upon it¹.

Ever faithfully Yours | M. Faraday

P.H. Berthon Esqr | &c &c &c